A base class for the ModelGenerationExtensionContext, PropertyExtensionContext, ModelTransformExtensionContext and ModelConversionExtensionContext classes.
命名空间: Microsoft.Data.Entity.Design.Extensibility
程序集： Microsoft.Data.Entity.Design.Extensibility（在 microsoft.data.entity.design.extensibility.dll 中）
用法
语法
声明
Public MustInherit Class ExtensionContext
public abstract class ExtensionContext
public ref class ExtensionContext abstract
public abstract class ExtensionContext
public abstract class ExtensionContext
备注
The ExtensionContext class is an abstract base class that is used to extend the functionality of the ADO.NET Entity Data Model Tools. Derived classes provide file and project information to Visual Studio extensions. For more information, see Extending the Entity Data Model Tools. For more information about extending the functionality of the ADO.NET Entity Data Model Tools, see Extending the Entity Data Model Tools and ADO.NET Entity Data Model Designer Extension Starter Kit.
The following classes are implementations of the ExtensionContext class:
ModelGenerationExtensionContext
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注意：The UpdateModelExtensionContext class is an implementation of ModelGenerationExtensionContext.
ModelTransformExtensionContext
ModelConversionExtensionContext
继承层次结构
System.Object
Microsoft.Data.Entity.Design.Extensibility.ExtensionContext
Microsoft.Data.Entity.Design.Extensibility.ModelConversionExtensionContext
Microsoft.Data.Entity.Design.Extensibility.ModelGenerationExtensionContext
Microsoft.Data.Entity.Design.Extensibility.ModelTransformExtensionContext
Microsoft.Data.Entity.Design.Extensibility.PropertyExtensionContext
线程安全
此类型的任何公共静态（在 Visual Basic 中为 共享）成员都是线程安全的。不保证所有实例成员都是线程安全的。
平台
开发平台
Windows XP Home Edition, Windows XP Professional, Windows Server 2003 、Windows Server 2008 和 Windows 2000
目标平台
Change History
另请参见
参考
ExtensionContext 成员
Microsoft.Data.Entity.Design.Extensibility 命名空间
其他资源
Extending the Entity Data Model Tools
Visual Studio Extensibility Developer Center